Relief valve for excessive-pressure vapor tanks and lines



M 415 F1927. arch i c. P. BUCK l RELIEF lVALVE FOR ExcEssIvE PRESSUREvAPoRvTANKs AND LINES Filed May I4, 1923 5:2 .IIII IIIIA J Patented Mar.15, 1927.

UNITED STATES PATEN'I @aF-HCB CHARLES I. BUCK, F TOPEKA, KANSAS.ASSIGNDR 'IO GUS-TINBACON `MANFACTURe INGr COMEANY, OF KANSAS CITY,MISSOURI, .A CORPORATION 0F MISSOURI.

RELIEF VALVE FOR EXCESSIVE-PRESSURE VAPOR TANKS AND LINES.

Application filed May 14,

This invention relates to relief valves for excess pressure tanks andlines, and for other places where the conventional type of relief valveis objectionable on the ground of chattering, as a chattering valve isliable to uneven wear and to relatively rapid deterioration, my objectbeing to produce a valve having a skirt of greater area than the valveseat, to insure the retention of the valve in open position under lesserpressure than that necessary to raise it, and to protect the valve andits passage from snow, hail and rain.

With this object in view, the invention consists in certain novel anduseful features of construction and combinations of parts as hereinafterdescribed and claimed; and in order that it may be fully understood,reference is to be had to the accompanying drawing, in which:

Figure 1 is a vertical section of a valve mechanism embodying theinvention; and

Figure Q is a plan view partly broken away.

Referring to the drawing` in detail, l in dicates a tank or gas linewithin which fluid may be stored or flow, under substantial pressure,and 2 is a relief opening therein surrounded with an air-tight relation,by an upstanding collar 3, provided at its upper extremity with anupwardly-facing valve seat 4E. Centrally of the collar and opening is avertical tubular guide 5, integrally connected by a plurality of radialribs 6 with the collar.

A valve 7 of the type shown or of any other suitable or preferred type,is adapted for normal engagement with said valve seat, and is rigidlysecured upon a vertical rod 8 extending slidingly through guide 5, andsecured upon the lower end of said rod is a retaining nut 9 or the like,adapted in the event of excessive elevation or unseating action of thevalve, to engage the lower end of the guide 5 and thus prevent com pletedislocation of the valve from the collar.

The rod 9 is equipped with a head 10 at its upper end, and secured uponthe rod between said head and the valve is a weight 11, the impositionof said weight on the valve, guarding against unseating move- 1923.Serial No. 638,844.

ment of the latter unless an excess pressure is created within the tankor line. In order to provide a practical construction in which the valveis readily removable for replacement, said weight l1 and valve 7 areformed of two members, the valve 7 being formed with an upstandinglannular rib or flange 13 which is received with a shouldered recess 14formed on the underface of the weight. With this construction. it willbe apparent that the parts are locked against accidental dislodgment ofthe weight from proper position on the valve. The said weight is alsoprovided at its lower end with an outwardly and downwardly flaring skirt12, the same bearing such relation to the collar and the valve, thatpressure escapingl up through the collar when the valve is unseated,shall impinge against said skirt, which thus adds its area to that ofthe valve for permitting the valve to remain unseated until the pressureis definitely lowered within the tank or line to such extent that whenthe valve is reseated it maintains 'its position until excess pressureis again created within the tank or line. In other words, by theparticular arrangement of the valve and the skirt projecting outwardlybeyond the valve, the pressure which raises the valve may be partlydissipated without the valve dropping back immediately upon its seat.Vihen the pressure drops sufficiently, however, the valve will return toits seat and will then, in conjunction with the weight, be suiiicienttoresist reelevation until the internal pressure of the tank is againexcessive. This construction, therefore, guards against undue chatteringand rapid deterioration from such cause, of the valve.

From the above description it will be apparent that I have produced arelief valve embodying the features of advantage set forth as desirable,and which may be modified in minor particulars without departing fromthe principle of construction and mode of operation involved.

I claim:

A tubular member terminating at one end in an upwardly facing beveledvalve seat and formed with a valve guide, a valve stem sliding in saidvalve guide, a relatively flat plate having its periphery slightlydownturned and forming a beveled valve and through said tubular memberin such a clihavng a central opening for the reception rect-ion as tosecure a substantially vertically of said valve stem and normallyresting on upward reaction to maintain the valve in 10 said valve seat,and a weighti'esting on open position.-

said valve and interlookecl therewith, said n Witness whereof I hereuntoaliix my Weight having a skirt flaringdownivardly signature.

and outwardly to deflect gas escaping CHARLES P. BUCK.

